Rigid or flexible endoscopes with optical or electrical image transmission for medical purposes and accessories for the same, namely light sources for operation with endoscopes and suitable for the illumination of objects to be examined with endoscopes, joint observation attachments or image deflection attachments having optical or electrical image transmission connectible to endoscopes, cameras and flash guns connectible to endoscopes, moving picture equipment connectible to endoscopes, video equipment and screens connectible to endoscopes, image processing equipment substantially comprising video cameras and computers connectible to endoscopes, manually operated tools modified for use with endoscopes, mechanically operated tools modified for use with endoscopes, mechanical, electromechanical, hydraulic or pneumatic positioning devices for endoscopes, excepting instruments in the dental and ophthalmological fields